For processing the high tensile metals:carbon stell common alloy stell,hard bronze forgeable castiron.etc.

加工高的金属:碳素钢、硬青铜和可锻铸铁。

Properties determined by mechanical testing, such as yield strength, ductility, ultimate tensile strength, hardness, bendability, impact strength, etc.

由机械试验决定的特性，如屈服、、极限、硬、弯曲性、冲击。